CVE-2026-27947— Group-Office Vulnerable to Remote Code Execution (RCE)
Quick assessment
Affected
Intermesh groupoffice
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Group Office是荷兰Group Office公司的一款模块化的办公套件。 Group Office 26.0.9之前版本、25.0.87之前版本和6.8.154之前版本存在代码问题漏洞，该漏洞源于TNEF附件处理流程存在缺陷，可能导致远程代码执行。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-27947
Vulnerability Information
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Vulnerability Title
Group-Office Vulnerable to Remote Code Execution (RCE)
Source: CVE Program / CVE List V5
Vulnerability Description
Group-Office is an enterprise customer relationship management and groupware tool. Versions prior to 26.0.9, 25.0.87, and 6.8.154 have an authenticated Remote Code Execution vulnerability in the TNEF attachment processing flow. The vulnerable path extracts attacker-controlled files from `winmail.dat` and then invokes `zip` with a shell wildcard (`*`). Because extracted filenames are attacker-controlled, they can be interpreted as `zip` options and lead to arbitrary command execution. Versions 26.0.9, 25.0.87, and 6.8.154 fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
Group Office 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Group Office是荷兰Group Office公司的一款模块化的办公套件。 Group Office 26.0.9之前版本、25.0.87之前版本和6.8.154之前版本存在代码问题漏洞，该漏洞源于TNEF附件处理流程存在缺陷，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Intermesh | groupoffice | >= 26.0.0, < 26.0.9 | - |
|
II. Public POCs for CVE-2026-27947
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: groupoffice
-
CVE-2026-45551
Group-Office: Authenticated Stored XSS in Administrator Cont -
CVE-2026-34838
Group-Office: Authenticated Remote Code Execution via PHP In -
CVE-2026-33755
Authenticated SQL Injection in Contact/query addressBookIds -
CVE-2026-30238
Group-Office: Reflected XSS in JavaScript context -
CVE-2026-30237
Group-Office: Self XSS in GroupOffice Installer License Page
Same vendor: Intermesh
-
CVE-2026-45551
Group-Office: Authenticated Stored XSS in Administrator Cont -
CVE-2026-34838
Group-Office: Authenticated Remote Code Execution via PHP In -
CVE-2026-33755
Authenticated SQL Injection in Contact/query addressBookIds -
CVE-2026-30238
Group-Office: Reflected XSS in JavaScript context -
CVE-2026-30237
Group-Office: Self XSS in GroupOffice Installer License Page
Same weakness: CWE-88
-
CVE-2026-108929
Netcore NR268 DDNS DDNSset.cgi execvp argument injection -
CVE-2026-108963
databasement多个版本命令注入漏洞 -
CVE-2026-107802
SumatraPDF — Windows command-line argument injection in AI s -
CVE-2026-11939
Security vulnerabilities have been found in IBM Verify Ident -
CVE-2026-18740
Security vulnerabilities have been found in IBM Verify Ident
V. Comments for CVE-2026-27947
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